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[IPV6] ADDRCONF: Check payload length for IFA_LOCAL attribute in RTM_{ADD,DEL}MSG message

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Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
This commit is contained in:
YOSHIFUJI Hideaki 2006-07-28 18:12:09 +09:00 committed by David S. Miller
parent a205729e2c
commit 643162258e
1 changed files with 4 additions and 2 deletions
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6
net/ipv6/addrconf.c
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@ -2853,7 +2853,8 @@ inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
pfx = RTA_DATA(rta[IFA_ADDRESS-1]); pfx = RTA_DATA(rta[IFA_ADDRESS-1]);
} }
if (rta[IFA_LOCAL-1]) { if (rta[IFA_LOCAL-1]) {
if (pfx && memcmp(pfx, RTA_DATA(rta[IFA_LOCAL-1]), sizeof(*pfx))) if (RTA_PAYLOAD(rta[IFA_LOCAL-1]) < sizeof(*pfx) ||
(pfx && memcmp(pfx, RTA_DATA(rta[IFA_LOCAL-1]), sizeof(*pfx))))
return -EINVAL; return -EINVAL;
pfx = RTA_DATA(rta[IFA_LOCAL-1]); pfx = RTA_DATA(rta[IFA_LOCAL-1]);
} }
@ -2877,7 +2878,8 @@ inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
pfx = RTA_DATA(rta[IFA_ADDRESS-1]); pfx = RTA_DATA(rta[IFA_ADDRESS-1]);
} }
if (rta[IFA_LOCAL-1]) { if (rta[IFA_LOCAL-1]) {
if (pfx && memcmp(pfx, RTA_DATA(rta[IFA_LOCAL-1]), sizeof(*pfx))) if (RTA_PAYLOAD(rta[IFA_LOCAL-1]) < sizeof(*pfx) ||
(pfx && memcmp(pfx, RTA_DATA(rta[IFA_LOCAL-1]), sizeof(*pfx))))
return -EINVAL; return -EINVAL;
pfx = RTA_DATA(rta[IFA_LOCAL-1]); pfx = RTA_DATA(rta[IFA_LOCAL-1]);
} }